Appliance Repair Questions? Ask a Technician for Answers ASAP
Is this on hot water and heating, one or the other?
Can you turn the heating on then turn the boiler off on the thermostat and still see if it trips?
It will not be the boiler, it will be the pump or motorised valve, you can confirm this by turning your heating and hot water on and turning the boiler off at the boiler tehrmostat